I would like to know the algorithm to compress a txt

I need a program that can compress a .txt file with saved and another that can unzip the file being compressed

Answer 1

[José-Luis]

zip

Answer 2

[Walter Roberson]

I highly recommend the book "Text Compression" by Bell, Cleary, and Witten. It details a number of text compression algorithms and provides theoretical proofs on compression efficiency. An excellent book for understanding how text compression works and the limits of compression. After reading it you should have little difficulty coding the algorithms in MATLAB.

https://www.amazon.com/Text-Compression-Timothy-C-Bell/dp/0139119914